Motion picture camera



June 29, 1937. D. M. JAHRAUS ET AL MOTION PICTURE CAMERA Filed June 14, 1952v 4 Sheets-Sheet l 5 2 7 7 2 2 m M 3 M c i A flu 0 I o 4.53% g i I 0.. E 0 u mum 0 7 7 w 1 A v n s w, .b a w 5 M INVENTORS DONALD M- JAHRA US ATfORNEY June 29, 1937.

D. M. JAHRAUS ET AL MOTION PICTURE CAMERA 4 sheets-sheet 2 Filed June 14, 1932 INVENTORS DONALD M JAHRAUS June 29; 1937.

D. M. JAHRAUS ET AL 3 MOTION P IGTURE CAMERA Filed June l4, 1932 4 Sheets-Sheet 5 INVENTORS DONALD M- JAHRAUS MQ/ZZ M/ ATTQRNEY June 29, 1937- D. M. JAHRAUS ET AL MOTION PICTURE CAMERA Filed June 14, 1952 4 Sheets-Sheet 4 INVENTORS DONALD M JAHRAUS Z ATTORNEY TATES PAE ICE

2,085,193 MOTION PICTURE clauses ware Application June 14, 1932, Serial No. 61?,098

1 Claim.

in response to its movement from one point to another.

Another object is the provision of a picture taking or recording apparatus including a movable support and a focusing element which are so intercoupled with one another that proper focusing is maintained when the apparatus is moved from one point to another thereby per mitting the operator to direct his attention solely to the movement of the apparatus into proper relation with the scene to be recorded.

An auxiliary object is the provision of a cam.- era view finderwhich is automatically controlled in response to movement of the support on which it is mounted.

in the recording of motion pictures, it is frequently desirable to move the camera quickly from one point to another for the purpose of recording 6 difierent views of a set or scene. It is desirable that this movement be made very rapidly in order to minimize the time required to record the different views of the scene. In the use of automatic focusing devices heretofore provided, con- 30 siderable time has been consumed in focusing the camera and adjusting the view finder after the desired point has been reached. In accordance with our invention, this loss of time is avoided by the provision of an improved focusing and adjusting means which are readily manipulated and are operated automatically in response to movement of the apparatus.

Our invention will be better understood from the following description, when considered in connection with the accompanying drawings, and its scope will be pointed out in the appended claim. w

Referring to the drawings,

Fig. l. illustrates a motion picture camera wherein our invention has been embodied,

Fig. 2 illustrates the adjustable cam arrangement whereby the camera is automatically io-' cused in response to its movement,

Fig. 3 illustrates certain details in the cam ad- 50 justing mechanism,

Figs. 4, 5 and 6 are different views of the focusing mechanism, and

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Figs. '7 and 8 illustrate the adjusting mechanism of the view finder. 55 The apparatus in connection with which the invention hasbeen illustrated includes a camera head provided with a soundproof cover ill and mounted on a pedestal il supported upon a' movable base l2 provided with wheels l3, M and i5. Mounted upon the shaft it of the wheels M and i5 is a sprocket ll arranged to drive a gear it through a chain i9 and sprocket 20.- ;Power is transmitted from the gear iii to the automatic focusing part of the apparatus through a jack shaft 26, a clutch 22, a universal joint 23, a telescoping shaft 2d, a universal joint (Fig. 2) and a shaft 26 provided with bearings 21 and 28. A lever 22' is provided for disconnecting the clutch 22 so that the camera may be operated independently of the automatic focusing mechafocusing shaft 32 through a pair of rollers 33 and 3 2 and an arm 35 mounted on the shaft 32. An arm 3% is also arranged to be clamped to the shaft 32 in the manner hereinafter described. A' thumb screw ill is provided for clamping the hub of the arm 35 to the shaft 32.

Adjustment in the contour of the cam member 3i is efiected by a plurality of thumb screws 38 located at the side of the cam plate and threaded into sliding members 3d provided with extensions W to which the cam member 3! is attached. The structure of this particular part of the apparatus, is illustrated more specifically in Figure e, which is a section taken on the line d i of Figure 2. that by adjustment of the thumb screws 38 the surface of the cam plate 3 i which cooperates with the roller 33 maybe made to assume any desired form.

Adjustment of the lens in relation to the cam member 3i to ensure proper focus of the camera as it is moved from one point to another is effected by means of a thumb screw 4! mounted on the end of a shaft it and threaded into a collar t3 which cooperates with'the lever 36. As shown more particularly in Figure 3, which is a section taken on the line 3-3 of Figure 2, the lever 36 is arranged to be clamped to the drum M by means of a thumb screw 55 and a tapered member 46. This drum is fixed to the shaft 32. By means 'of the thumb screw Bl the hub of the arm is clamped to this drum. In adjusting the cam member 3| the thumb screw 31 is 1005- It will be readily understood ash ousted oe the miller es the 32 by me attaehee be e p 3), the m ks e a m 3% arm the moved out of aiignmei' i, "with one another. '1 ev o aiigmnent by adjust ment of M16 soyew which corresponds wtened to clamp tee hub of the roller to the shaft. Unclel" these conditions, the rollers 33 and ti l, the and the shaft are moved accordance with the contour of the surface of the cam 39 and the optical member 6& of the oamei'a is automatical- 1y feeuseci through the tint: members 58 and t9 interposed between it and the shaft Any suiteioie means may be provided for guiding the cam plate as and the various parts which are mounted on A satisfactory toms oi guide is illustrated in meme 3.

It is necessary for the operator of the apparatus to be able to see a correct image of field photographed in the ViEW finder. As the posi mber i the p22 proper afijllswfl drum is geare complete movement me eanz s arranged to be ELCtHEtiJeJ thrown. operates tinou move a shaft taming jvstment of a View [12.81' 353.

males meshes the particular driving" is known to those skilled i detailed description. ing the distance traveled, may be provided on the she "t Having thus described our invention, claim is:

A motion picture apparatus including ea! system, a Vi w finder, a movable support, means including a earn member operable in te-' mousing sponse to movement o1 said support '20 said system, means operable in response to s2 0. movement for adjust we said finder, means for adjusting the contom" m member DONALD Ju ius, RUE? 

